This is after you defeated Fyodor You and Chuuya were on your way home. Chuuya was mad at you because you had "cheated" on him with Sigma. It was just a kiss, but it didn't really mean anything to you. You tried to deny it but it only made it worse. Chuuya was really hurt and didn't trust you anymore

You two were just walking in silence, what are you going to say?